Metallic core or reinforce for castings.



H. SGHUPPENER.

METALLIC GORE 0B. REINPORGE FOR OASTINGS.

APPLIOATION FILED FEB. 16, 1912. 1,065,733. Patented June 24, 1913.

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v au v J .HJ b a s. H q H ....W w if HEINRICH SCI-IUPPENER, OFVOELKLINGEN-ON-THE-SAAR, GERMANY.

METALLIC CORE OR REINFORCE FOR CASTINGS.

Specification of Letters Patent.

Patented June 24, 1913.

Application filed February 16, 1912. Serial No. 678,132.

T 0 all whom it may concern:

Be it known that I, I'IEINRICH Sonorrnxnn, a subject of the Emperor ofGermany, residing at No. 8 Krebsstreet, Voelklingen-on-the-Saar,Rhineland, Germany, have invented a certain new and useful Improvementin Metallic Cores or Reinforces for Castings, of which the following isa specification, reference being had therein to the accompanyingdrawing.

The present invention has for its object the strengthening of castingsand consists in a filling, core or wrought metallic rein-- forceinserted in a cast body, to strengthen it.

The invention consists in a wire-like flexible twisted metal corecomprising a plurality of members, some of which may be hollow, or sospaced as to form channels or passages between them, thus producing anoutlet for the gases in the mold. Both ends of the coil need not beinserted; in the molten metal, in this way the wires will yield morereadily to expansion caused by heat.

In order to obtain a casting containing no bubbles the invention will befound of advantage; as the air in the mold is displaced by the incomingmolten metal and the outer wires will adhere to the cast body, while theinner wires will remain movable. The wires being wound spirally inopposite directions, the necessary expansion and contraction isobtained.

In the accompanying drawings, which form part of this specification:Figure 1 is a plan View of the core or filling detached, and Fig. 2 isa like View showing the core in a mold surrounded by one part of aflask.

The core or reinforce is composed of several wires a Z) which aretwisted or coiled together, and may be made smaller at their extremitiesor ends. The wires may be of any shape found to be most practical, orthe same may be hollow as shown at o. The coils may be wound around astick which will be withdrawn as soon as the wires have been woundtogether, whereby a channel will be formed in the center of the core.Several layers of wires may be wound whereby the twist or torsion may bechanged, these changes of construction will greatly strengthen the core.The core may be heated before being inserted in a mold in any preferredmanner, however the heating is not essential, as in cooling the castmetal, the wire core will yield to any expansion or contraction.

In practising my invention, the core a is laid in the sand f properlyanchored therein in the manner of anchoring sand cores, and when themetal 6 is poured into the mold contained in the flask (Z, the core orreinforce becomes thoroughly embedded therein and by the nature of themetal of which it is made adds greatly to the strength of the casting.

In pouring the molten metal, air contained in the mold and displaced bythe metal flows along the channels between the wires 6 and escapesthrough the usual vent in the mold.

Having thus fully described my inven tion, what I claim is:

1. A metallic core or reinforce for castings consisting of groups ofmembers wound spirally in opposite directions, the outer group beingconcentric to the inner group and adapted to be embedded in the moltenmetal while the inner group remains free.

2. A metallic core or reinforce for eastings consisting of groups oftubular members wound spirally in opposite directions the outer groupbeing concentric to the inner group, forming channels for the escape ofgases from the mold, and said outer group being adapted to be embeddedin the molten metal, while the inner group re mains free.

In testimony whereof I affix my signature in the presence of twowitnesses.

HEINRICH SCI-IUPPENER.

Vitnesses Bnssrn F. DUNLAP, LoUIs VANDORY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

